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Lublicant sheet and composition for forming the same

A lubricating sheet and composition technology, which is applied in the direction of lubricating composition, boring machine/drilling machine parts, maintenance and safety accessories, etc., can solve the problems of poor quality, increase the thermal dispersion force of cast film, and low thermal conductivity, and achieve increased Preserve stability and increase efficiency

Active Publication Date: 2010-07-21
SANG A FRONTEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the organic resin film is a material with low thermal conductivity, so the casting film has the possibility of suppressing heat dissipation to aluminum, water-soluble lubricant layer and air layer
In addition, in order to increase the thermal dispersion force of the cast film, thermally conductive inorganic particles such as aluminum oxide, manganese oxide, and boron nitride are added to induce wear of the drill bit and remain during the plating process, resulting in poor quality
[0012] On the other hand, although the inventions disclosed in Korean Patent Application Publication No. 2001-0110645 , Patent No. 0657427 , and Patent No. 0628611 , which relate to water-insoluble lubricant sheets, have improved the storage properties of the water-soluble resin layer ( Moisture resistance, ease of storage), but the melting point of the resin layer is high, and the heat dissipation effect caused by the resin layer is low, so there is a possibility of smear phenomenon caused by the fusion of the PCB resin substrate, and the temperature of the drill bit rises When the lubricating resin melts and remains on the inner wall of the hole, it is difficult to remove the remaining lubricating resin by washing, so there is a problem of failure during plating.

Method used

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  • Lublicant sheet and composition for forming the same
  • Lublicant sheet and composition for forming the same
  • Lublicant sheet and composition for forming the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] First, a 2-component polyurethane resin bar was applied to a 120 μm aluminum sheet to introduce a 5 μm adhesion increasing layer.

[0074] Next, 50g of linear polyethylene glycol (ALKOX R-400 from MEISEI company, molecular weight 180,000-250,000) and 50g linear polyethylene glycol (KONIONPEG-20000F from GREEN SOFT CEM company, molecular weight 20,000) were dissolved in 700g of water and 300g of After the alcohol, 5 g of nonionic surfactant PEG (400) modified ester was added to prepare a coating liquid. The coating solution was applied to a 120 μm aluminum sheet (purity: 99% or higher) on which the adhesion increasing layer was formed using a doctor blade coating method with adjustable thickness to form a resin layer. After coating, the coated test piece was placed in a thermal cycle drying oven at 90° C. to evaporate the solvent, thereby producing a lubricating piece with a dry coating film thickness of 40 μm.

Embodiment 2

[0076] Mix 50g of linear polyethylene glycol (ALKOX R-150 of MEISEI company, molecular weight 100,000-170,000) and 50g of modified polyethylene glycol with a calculated molecular weight of 100,000 (polyethylene glycol with a molecular weight of 6,000 in polyalkylene Under the presence of carboxylic acid and acid catalyst, polycondensation is carried out, to have the resin of the functional group that is substituted with ester in the synthetic molecular chain.The synthetic resin is dissolved in 700g water and 300g alcohol after being dissolved in 700g water and 300g alcohol , 7 g of nonionic surfactant PEG (400) modified ester was added to prepare a coating liquid. A lubricating sheet was produced in the same manner as in Example 1 using the resulting coating solution.

Embodiment 3

[0078] Except changing the content of the nonionic surfactant PEG (400) modified ester in the foregoing embodiment 2 to 20g (relative to the content of the solid powder is 20% by weight) to make the coating liquid, with the foregoing embodiment 2 The same method is used to manufacture lubricating sheets.

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Abstract

The invention relates to a lubricant sheet for printed circuit board perforation that is used in the drilling step in the printed circuit board production step, and composition for forming the same. The lubricant sheet has a lubricant resin bed, which includes more than two water soluble resins with different dissolvability to water and is formed by microphase separation, the viscosity number of the at 150 DEG C melting is 5*10<4>-1*10<5> cp at the condition of shear velocity of 100 mm / sec.

Description

technical field [0001] The present invention relates to a lubricating sheet used in a drilling process (drilling) in a printed circuit board manufacturing process, and a composition for forming the lubricating sheet. Background technique [0002] The manufacturing steps of printed circuit boards, for example, the computer numerical control drilling step (CNC Drilling) is to form via holes (Via Hole) and through holes (Through Hole) on the substrate, and form electrical circuits by internal plating. [0003] In recent years, along with the miniaturization, thinner film and higher density of printed circuit boards, smaller diameter and higher density of through-hole openings are required. In general, when drilling a printed circuit board with glass fiber impregnated with epoxy, etc., frictional heat will be generated between the drill bit and the printed circuit board, so the thermal deformation of the drill bit will cause the accuracy of the drilling position to change. Poor...

Claims

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Application Information

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IPC IPC(8): B23B41/02C10M173/02C10M107/42C10M107/24C10M107/34
CPCB23B41/00B23B51/06B23B2250/12B23Q11/10B23Q11/14C09D133/04H05K3/0047
Inventor 李相匊安昌训禹炳赞
Owner SANG A FRONTEC
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